Expression-box.



1%. 853,814. PATIWIN'IED MAY 14, 1907.

E. LUNDBERG & J. HATTEMER.

EXPRESSION BOX. AEPLIOATION rnnn xov.s,19os' 2 SHEETS-SHEET 1.

nmnfow No. 853,814. I PATENTED MAY 14, 190?;- E. LUNDBERG & J. HATTEMER.

EXPRESSION BOX.

APPLICATION FILED NOV. s, 1906.

2 SHEETS-SHEET 2.

llll uoenfozd X; L wAM u vg 32 sKm Xm /vw; in eases v 35 invention comprises certain '4 improved expression unirnn STATES PATENT "OFFICE.

ENDFRED LUNDBERG, or WESTFIELD, NEW roux, AND JUsTUs HATTEMER,

OF WEST NEW YORK, NEW

JERSEY, ASSIGNORS TO HARDMAN, PECK 61:

COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEvV YORK.

EXPRESSiON-BOX.

Specification of Letters @a'tent.

Patented May 14, 1907.

To all whom it 71mg concern:

Be it known that we, ENDFRED LUNDBERG, a citizen of the United States, residing at Wcstfield, county of Chautauqua, and State of New York, and JUsTUs HATTEMER, a citizen of the United States, residing at West New York, county of Hudson, andState of New Jersey, have invented certain new and useful Improvements in Expression-Boxes;

: and we do hereby declare the following to be a full: clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

for controlling a divided action of self-playing musical instruments and has for an ob ject' to provide a device embodying improved means for regulating the degree of exhaust 20 applied to the pneumatics regulating the action.

A further object of the invention is to provide in'a musical instrument having a divided action, valves of improved structure z 5 for controlling the exhaust at either end of the action independently of the other end.

A further object of the invention'is to pro wide in a device of the rlass an expression box communicating with a light and heavy ex- 30 haust, and with valves arranged to control the exhaust and to put the action into communication with. either the light or heavy j.

exhaust and controllable by the operator.

With these and other objects in view the other novel constructions, combinations and arrangements of parts, as will be hereinafter fully described and claimed.

In the drawings :Figure 1 is a view of the box with one side formed with portions broken away to show the operating parts. Fig. 2 is a longitudinal, transverse section taken on line 2 2 of Fig. 1. 3 is a slightly modified form of the #5 expression box showing the valve operated by, gravity and controlled by primary pneunuitics', and shown partly in side elevation and partly in vertical longitudinal section. Like characters of referencerlesignate cor responding. parts throughout the several views. i

" The expression bc x forming the Sub ect- This invention relates to expression boxes matter of this application comprises an outer box or casing 10 of any approved size and form, and having an opening 11 in communication with the light exhaust and openings 12 and 13 in communication with the heavy exhaust.

The opening 11 from the light exhaust opens into a chamber 14 formed within the casing 10 by partitions 15 and 16, disposed upon opposite sides of the opening 11 the said opening communicating with the chamhere 17 and 18 upon opposite sides of the chamber 114, through the said chamber 14 and passages 19 and 20.

T he openings 19 and 20 are closed, respectively, by means of flap valves 21 and 22 ,1 opening inwardlywithin the chamber 14 and adaptel to close the openings against the passage of air from the chamber 14 to the 1 chambers 17 and 18. The chambers 17' and 18 communicate with ladjacent chambers 23 and 24, respectively, through passages and 26 with which chambers the openings 12 and 13 from the 11 heavyexhaust are also in communication, Within the chambers 23 and 24 are disposed puppet valves 27 and 28, respectively, ar- Zj. ranged to close the openings 25 and 26 between the said chambers 23 and 24, and the chambers 17 and 18, respectively. The puppet valves 27 and. 28 are respecti ely mounted upon valve stems 29 and 30 having their 1 extremities slidably mounted within keepers l 31 and 32 and. with opposite ends in communication with pneumatics 33 and 34:. The pneumatics 33 and 34 are disposed over chambers 35 which said recesses communicate by means of passages 36 with means for admitting atmospheric air to the chambers 35 beneath the pneumatic 33 and 34.

In the form shown in Figs. 1 and 2 the alve stems 29 are preferably mounted to move horizontally and actuated by means of springs 37 and 38 so that the valves 27 and 28 are held normally and yieldinglyopen by the said springs and with the passages 25 and 26 forming normal communication between the chambers 23 and 24 and the chambers '17 and 18 respectively.

The form shown in Figs. 1 and 2 is the sim pler form, wherein the chambers 35 are in direot communication with the atmosphere by means of tubes 39 and 46 approved connection as the and 42 by means of which 1; 1 u nication with the atmosphere urat will. .The chambers ere al municati'on with the chaz through bleeders ,43 when exhaustion in the chambers 23 the chambers 35 is equalized and the springs 37 and 38 permitted to act to hold the valves 27 and 28 normally open. ii hen atmospheric air is admitted through the .connections conventionally indicated by the flexible tubing 41 and 42 into the chamber the exhaustion upon that side of the pine: nation 33 and 34 is temporarily overcome and the atmospheric pressure within the chambers acting upon the pneumatics 33 closes the valves 27 and 28 to the: so the openings 25 and 26; Under no] conditions the heavy exhaust a g valves 21 and. 22 hold said valves closed against the tension of the light eihaust in the chamber 14 so that the exhaust is from the action through openings 44 and 45 which connect with the respective sections of the di vided action, the chambers 17 and. 18, the openings and 26 into the chambers 23 and 24, and outwardly through the one D and 13 to the main heavy exhaust rxnainbcr. When, however, the 127 and 128 are closed by reason of the admission of air to the chambers the o enings 25 and 26 being thereby closed the lght exhaust through the opening 11 opens the flapvalves 21 and '22'so that the exhaust is then from the action through. the openings 44 and the chambers 17 andlS, the openings 19 and 2(1 into the chamber 14 and outwardly "'hrough the'opening 11 to the main light exhaust chamber.

For closing communication between the expression box as a whole and the actioiir. during re-wind valves 46 are arranged to close valve stem 47 connected with any approved ortion of the mechanism as shown in Fig. in the-structure shown at Fig. 3, twoother chambers '49 and 50 are provided in communication with the chambers 23 and 24 through 0 enings 51 and 52 and within which said 0 ambers 49 and 50 are disposed primary valves 53 and 54. The primary valves 53 and 54 are mounted upon valve stems 55 and 56 and are arranged to close openings 57 and 58 with the atmosphere from the inside,

- the said valve stems carrying also valves 59 and 60 arranged to close the said openings 'from the outer side. The valve stems and 56 have their extremities slidably mounted within keepers 61 and 62, and their opposite ends in engagement with pneumatics 63 tion with the chambers 49 and. 59 through bleeders 66 and 67 and with the atmosphere by means of passages 68 and tubes 69 and 70. It will be understood that the chambers 49 and 50.are under continual exhaust from the heavy exhaust chamber through the pars sages12 and 13, and 51 and 52, so that with the prime ty valves in the position shown in Fig. 3, the pneumatic 34 is subjected to ex haustfrom the chamber 50 through the passage 58 and the passage 36, while the exhaust upon opposite sides of the pueumatics 63 and 64 is equalized through the bleedcrs 66 and 67 So long as the tubes 69 and 70 are closed to the atmosphere the valves 53 and 54 remain. in the position shown in the figure, but when communication is open to the atmosphere the exhaust tension within the chamber 65 is relieved and the exhaust tension within the chambers 49 and '50 raises the pneumatics 63 and 64 to close the openings 57 and 58 by means of the valves 53 and 54and simulta neously raises the valves and 60 so that the openings 57 and 58 are in comn'iunicatiou with the atmosphere and the passages 36 and chambers 35 are also relieved of tension so that the exhaust tension within the chambers 23 and 24 raisesthe pncumatics 33 and 34, as hereinbefore descriljied.

pear that both ends of the action are simulta neously subjected to either the light or the heavy exhaust and such may be accomplished in the manner described, but it is to be understood that opposite sides of the ex-' pression box constitute substantially indc-- pendent controlling means, so that both ends of the action maybe simultaneously subjected to either degree of exhaustion, as described, or either end may be subjected to the heavy v exhaust while the opposite end is-subjected to the light exhaust by manipulating the valve upon one side only of the @XIHPSSlOn H 1 box, as described.

the openings 44 and 45 and controlled by the Z control the valves governing communication between the high tension reservoir and the ducts.

2,.'In a mechanism of the class described, a

divided action, a high. tension reservoir and "a low tension reservoir. ducts arranged for commumbation with the divided action, a

From the above description it would ap- 9 chamber in communication with the ducts and communicating with the' low tension reservoir, flap valves opening within the chamber and arranged to close communication between the low tension chamber and the ducts, chambers in communication with the ducts, and communicating with the high tension reservoir, puppet valves within the high tension reservoir chambers, and positioned to close the communication between the high tensionchambers and the ducts, and pneumatics arranged to actuate the puppet valves. v I

3. In a mechanism of the class described, a divided action, a high tension reservoir and a low tension reservoir, ducts communicating with the divided action, a chamber in communication with-the ducts, and also in communication with the low tension reservoir, flap valves within the low tension chamber, and arranged to govern the communication between the low tension chamber and the ducts, chambers in communication with the ducts and also in communication with the high tension reservoir, puppet valves dis-,

posedwithin the high tension chamber and positioned to close communication between such chambers and the ducts, pneumatics dis osed within the high tension chambers an' arranged to actuate the puppet valves,

and means for actuating the pneumatics.

4. In a mechanism of the class described, a divided action, a high tension reservoir, and a low tension reservoir, ducts commumcatmg 3 with the divided acti on, a chamber incommu nication with the ducts and also communicat- 'ing with the low tension reservoir, valves disposed within the low tension chamber and opening inwardly and positioned to govern communication between the low tension chamber and the ducts, chambers in communication with the ducts and arranged for independent communication with the high ten{ sion reservoir, valves disposed within the high tension chambers and arranged to govern com munication between the high tension chem-- bers and the ducts, pneumatics disposed within the high tension chambers, and arranged to actuate the valves, means for equalizin the exhaust tension upon opposite sides 0 the pneumatics, and means to overcome the exau'st upon one side of the pneumatics.

5. In'a mechanism of the class described, a divided action, a high tension reservoir and a low tension reservoir, ducts communicatingthe secondary pneumatics and governing communication between the high tension chambers, and the ducts, other chambers in communication with the high tension chambers, primary pneumatics disposed within the last-mentioned chambers, means for equalizing the exhaust upon opposite sides of the primary pneumatics, valves carried by the primary pneumatics and arranged to establish communication from the secondary pneumatic passage alternately with the exaust and with the atmosphere, and means to overcome the exhaust within the primary pneumatic.

- In testimony whereof we afiix our signatures in presence of two witnesses.

ENDFRED LUNDBERG. J USTUS HATTEMER.

Witnesses:

CARL E. PEoK, HUGO Moon. 

